K2m, Inc.

Brittany Lang

Michael Barrus

A spinal fixation device includes a modular head assembly and a bone screw having a head and a shank. The modular head assembly includes a housing defining proximal and distal surfaces and a throughhole therethrough; an anvil slidable within the throughhole; a biasing member circumferentially surrounding the anvil; an assembly cap secured to the housing and defining an inner surface having a first portion with a first diameter and a second portion with a second diameter smaller than the first diameter; a retaining ring movable from the first portion of the assembly cap to the second portion of the assembly cap to transition the retaining ring between a first configuration in which the retaining ring is sized to receive the head of the bone screw and a second configuration in which the retaining ring is compressed about the bone screw to fix the bone screw relative to the modular head assembly.

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Warrenton, VA, United States of America

Brittany Lang